HV9985K6-G Supertex, HV9985K6-G Datasheet - Page 12

• Manufacturer Part Number: HV9985K6-G
• Description: LED Drivers Three Channel Closed Loop LED Driver
• Manufacturer: Supertex

Specifications of HV9985K6-G

• Operating Supply Voltage: 10 V to 40 V
• Package / Case: QFN-40
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Pin Description (K6)
Pin
33
30
36
29
37
28
12
27
38
26
13
25
14
24
10
11
15
16
17
18
19
#
1
2
3
4
5
6
7
8
9
PWMD1
PWMD2
PWMD3
COMP1
COMP2
COMP3
FDBK1
FDBK2
FDBK3
Name
VDD1
VDD2
VDD3
OVP1
OVP2
OVP3
REF1
REF2
REF3
FLT1
FLT2
FLT3
GND
SKIP
VDD
CS1
CS2
CS3
VIN
NC
EN
Description
These pins are the power supply pins of the three channels. They can either be connected to the VDD
pin or supplied with an external power supply. They must be bypassed with a low ESR capacitor to their
respective GNDs (at least 0.1μF). All VDD pins (VDD, VDD1-3) must be connected together externally.
An external 5.0V supply can be connected to these pins to power the IC if the internal regulator is not
used.
These pins are used to drive external logic-level disconnect switches. The disconnect switches are used
to protect the LEDs in case of fault conditions and also serve to provide excellent PWM dimming re-
sponse by disconnecting and reconnecting the LEDs from the output capacitor during PWM dimming.
These pins are used to sense the source current of the external power FETs. They include a built-in
100ns (min) blanking timer. Connecting an RC-network at these pins programs the slope compensation.
Refer to the Slope Compensation section for additional information.
Stable closed loop control can be accomplished by connecting a compensation network between each
COMP pin and its respective GND.
These pins are the output current feedback inputs for each channel. They receive voltage signal from
external sense resistors.
The voltage at this pin sets the output current level for each channel. Recommended voltage range for
this pin is 0 - 1.25V.
These pins provide the over voltage protection for the three channels. When the voltage at any of these
pins exceeds 1.25V, the HV9985 is turned off. The fault timer starts when the voltage drops below
1.125V. Upon completion of the fault timer the IC attempts to restart.
Input of the internal 40V linear regulator.
This pin is the output of the linear regulator. It maintains a regulated 5.0V as long as the voltage of the
VIN pin is between 10V and 40V. It must be bypassed with a low ESR capacitor to GND (at least 0.1μF).
This pin can be used as a power supply for the three channels.
When the pin is pulled below 0.8V, then IC goes into a standby mode and draws minimal current.
Ground connection for the common circuitry in the HV9985.
This pin programs the hiccup timer for fault conditions. A capacitor to GND programs the hiccup time.
No connect.
PWM dimming of the three channels is accomplished by using the PWMD pins. The three pins directly
control the PWM dimming of the three channels and a square wave input should be applied at these
pins.
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1235 Bordeaux Drive, Sunnyvale, CA 94089
12
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Tel: [phone]
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www.supertex.com
HV9985